105
MITSUBISHI MICROCOMPUTERS
M37207MF-XXXSP/FP, M37207M8-XXXSP
M37207EFSP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
and ON-SCREEN DISPLAY CONTROLLER
I
2
C Control Register
I
2
C Status Register
Address 00DC16
Address 00DB16
b7 b6 b5 b4 b3 b2 b1 b0
I
2
C status register (S1) [Address 00DB
16
]
I
2
C Status Register
0
3
4
5
6, 7 b7 b6
0 0 : Slave recieve mode
0 1 : Slave transmit mode
1 0 : Master recieve mode
1 1 : Master transmit mode
1
2
0
0
0
0
0
B Name Functions
After reset
RW
Communication mode
specification bits
(TRX, MST)
0 : Bus free
1 : Bus busy
Bus busy flag (BB)
0 : Interrupt request issued
1 : No interrupt request issued
I
2
C-BUS interface interrupt
request bit (PIN)
0 : Not detected
1 : Detected
Arbitration lost detecting flag
(AL) (See note)
0 : Address mismatch
1 : Address match
Slave address comparison
flag (AAS) (See note)
0 : No general call detected
1 : General call detected
General call detecting flag
(AD0) (See note)
0 : Last bit = “0 ”
1 : Last bit = “1 ”
Last receive bit (LRB)
(See note)
Note : These bits and flags can be read out, but cannnot be written.
Indeterminate
R—
R—
R—
R—
R—
RW
0
RW
b7 b6 b5 b4 b3 b2 b1 b0
0
to
2
Bit counter
(Number of transmit/recieve
bits)
(BC0 to BC2)
b2 b1 b0
0 0 0 : 8
0 0 1 : 7
0 1 0 : 6
0 1 1 : 5
1 0 0 : 4
1 0 1 : 3
1 1 0 : 2
1 1 1 : 1
3
I
2
C-BUS interface use
enable bit (ESO)
0 : Disabled
1 : Enabled
4 Data format selection bit
(ALS)
0 : Addressing mode
1 : Free data format
5
Addressing format selection
bit (10BIT SAD)
0 : 7-bit addressing format
1 : 10-bit addressing format
6, 7 Connection control bits
between I C-BUS interface
and ports
b7 b6 Connection port (See note)
0 0 : None
0 1 : SCL1, SDA1
1 0 : SCL2, SDA2
1 1 : SCL1, SDA1
SCL2, SDA2
0
0
0
0
0
I
2
C control register (S1D : address 00DC16)
I
2
C Control Register
B Name Functions
After reset
RW
Note: When using ports P11-P14 as I C-BUS interface, the output structure changes
automatically from CMOS output to N-channel open-drain output.
2
2
RW
RW
RW
RW
RW
